This supplemental report is being submitted to provide the results of the legal manufacturer's final investigation.A review of the device history record found no deviations that could have caused or contributed to the reported issue.It has been over 5 years since the subject device was manufactured.Based on the results of the investigation and the information provided, it is possible that the foreign material in the air/water channel and cylinder was simethicone.However, the cause of the material remaining in the device could not be determined.Additionally, the foreign material in the auxiliary water channel could not be determined.There was no damage to the area where the foreign material was detected, and it was unknown if there were any deviations from the cleaning disinfection and sterilization (cds) steps provided in the instructions for use (ifu).Therefore, the cause of the material remaining in the device could not be determined the instruction manual states the detection method associated with the event in "gif/cf/pcf-190 series operation manual chapter 3 preparation and inspection", and preventative measures in "gif/cf/pcf-190 series reprocessing manual chapter 5 reprocessing the endoscope".Olympus will continue to monitor field performance for this device.
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